Well, I've somewhat successfully upgraded my 64GB Microsoft Surface Pro with a 240GB Intel 525 mSATA SSD. I can confirm that what's in there is an industry standard mSATA Micron C400 SSD, and that most likely, any mSATA SSD will work just fine.

I do have a warning however - I don't see any way possible to disassemble the Surface without destroying the touchscreen functionality. The reason for this is because the touchscreen connectors are slim ribbon cables that are glued on two sides. The side with the actual connector is glued to the back of the display and has a weak adhesive. The connector contacts are made of a conductive powder, similar to a temporary trace made by a circuit pen. The back side of the touchscreen connector is glued onto the Surface case with the super sticky 'tar' like adhesive described in the ifixit teardown.

tlkudo,
It sounds like between the two of us we'd have a fully functioning 256GB Surface Pro.

I'm the guy from the thread over at tabletpcreview. I believe my Crucial M4 got locked and I will have to remove it to fix it. This seems to be a bug that other M4 owners have experienced. I will be getting a 525 tomorrow and will change it out.

Can you please detail your cloning process? Most importantly, did you do the clone after you put the 525 in your Surface Pro. Thanks!

I also wanted to mention that on mine the touch sensors did come up a bit but I was able to press them back and they seemed to stick in place. Microsoft sure didn't intend for this one to be opened. It's crazy how easy it is to pull those up.

Listening to the latest AnandTech podcast, it seems that 20nm flash will make it such that Surface Pro 2 is likely to ship with 128GB and 256GB configurations without any significant price increase(though that doesn't really help you today though).

Thank you for the welcome Drsignguy. And, thanks to dagamer34 for the heads up that AnandTech has a podcast. How did I miss that one. I'm downloading the latest episode right now. Combining one of my favorite sites with a podcast makes me very happy.

I'm getting ready to board a flight back home right now so tonight I will have all my tools and the new drive (Intel 525). I'm hopping to have it up and running before the sun rises.

Pretty nice. It sounds so easy but in reality............. So, how is the overall appearance of your device after you replaced the touch cover. Did you replace the tar like tape or did you clean it up. Also does your touch screen work after all said and done.

I can't tell if you ripped the pads off of the PCB, but if you didn't then get a no clean flux pen & thin (tin/lead) rosin core solder. Clean and tin the pads (tin them lightly), then heat through the top of the cables contact points to join the two.

The worst thing that could happen is you melt the top of the cable. If that happens, just cover the melted bits with some 3 hour silicone caulk using your finger.